Plaster block and composition therefor



Patented May 25, 1926.

UNITED STATES PATENTIOFFICE.

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PLASTER BLOCK AND GOMPOSITION THEREFOR.

Re brewing. Original application flied October 12, 1923, Serial No. 868,045. Divided and this application filed Januar -2o, 1925. Serial 110.8,592-

This patent is a division of my application for Letters Patent, Serial No. 668,045,

filed October 12, 1923.

This invention, generally stated. relates l to partition, wall, ceiling and like bu'lding construction, and has more especial relation to a so-called plaster composition and block as made therefrom and as used in said above constructions. The leading object of the present invention is to provide a composition suitable for the manufacture of co -called plaster bloc-k adapted for inside or interior constructions,

which blocks are possessed of lightness in.

structure; ,which may be inexpensively manufactured; and which are possessed of a rapid hardening agent, sulphite-of-zinc.

Other and further objects not at this'time appearing will be referred to hereinafter.

The invention consists of the novel composition and paster-blocks as made therefrom as hereinafter described and finally claimed. I k

In theymanufacture of my novel composition, as used for the making of so-called plaster blocks for inside or interior con? structions, such as walls, partitions, ceilings 40 and the like, I employ plaster-of-Paris, powdered or finely granulated cork, wood. pulp, manila, cocoanut or other suitable fibrerbothlong and-short, and sulphite-ofzinc. Of these materials, the plaster-of- Paris andpowdered or finely granulated cork form the base of my-composition; the fibres act as a binder; and thes'ulphite-ofzinc serves as an agent for the rapid hardening of the com osition. All of the mate'- rials are employ in a dry state and mixed together, sufiicient water being added to enable molding thereof into blocks or slabs of anydesired configuration and size, The proportions of these ingredients, 'as 1 prefer to employ them, are as follows: Plaster-of-Paris 17 lbs.,-powdered or finely granulated cork 2 lbs, fibres (preferably a mixture of long and short fibres) three ounces, sulphite-of-zinc one ounce. i A plaster block as made from a com tion as above described is possessed of 0th strength and lightness and has moisture, fire and. sound resisting properties which at kes it particularly suitable for erecting inikr'grl'nbpcilding structure, as partitions, 05 walls, d eilings, especially since the composition may be easily and inexpensively made. What I claim 1s:

1. A composition of the character stated 9 comprising plaster-of-Paris, powdered or finely granulated cork, fibre and sulphiteof-zinc.

2. Acomposition of the character stated comprising about three-parts of plaster-of- Parls, about one part powdered or finely granulate cork, a small quantity of fibre and a s all quantity of sulphite-of-zinca 3. As a new article of manufacture a block or slab formed of pl'aster-of-Paris, powdered or finely granulated cork, fibre and sulphite-of-zinc. v

4. As a new 'article'of manufacture a block or slab formed of acomposition consisting of about three parts of plaster-of- 55 Paris, abut one part of powdered onfinely granulated cork. a suflicient quantity of tibres to ensure a binder and a suflicient quantity of sulphite-of-zinc to hasten hardening.

5. The herein described mode of making L plaster-blocks or slabs which consists in taking about three partsof plaster-of-Paris about one part of powdered or finely granulated cork, a sufliclent quantity of longand short fibre to serve as a binding agent and 5 Ca sufiicient quantity of sulphite-of-zinc to hasten hardening,all in dry formfiand mixing all together with sufficient water to enable the resultant composition to be molded into blocks or slabs.

In testimony whereof, I have hereunto igned my name.

FREDERICK M. VENZIE. 

